11-Isopropyl-2,4-diazaspiro(5.5)undec-8-ene-1,3,5-trione 2,4-Diazaspiro(5.5)undec-8-ene-1,3,5-trione, 11-isopropyl- 4-24-00-02054 (Beilstein Handbook Reference) 67196-38-7 BRN 0220758 NSC 117454